Written apparently in Ireland. The Manuscript is mentioned among the 'Libri Scottice scripti' in the St. Gall catalogue of about the middle of the ninth century. A sixteenth-century St. Gall ex-libris is seen on p.5.

p. 5 has the Insular initials I N P followed first by capitals and then by a line of text in Irish majuscule daubed with red and yellow and surrounded by red dots; the page-length initial I serves as one side of the ornamental frame enclosing the page ; small capitals at the beginning of sentences are daubed with red or surrounded by red dots; capitals are often followed by large letters gradually diminishing to normal size. Membranes are vellum of the Insular type and of poor quality. Ink black. Script is either Irish majuscule in transition, in part roundish (p. 27, etc.), in part angular, compressed, and verging on minuscule, or plain Irish minuscule (p. 21)